Computerized Static and Dynamic Balance Measurements in Panic Disorder Patients

Several studies have shown an association between panic disorder (PD) and reduced balance abilities, mainly based on functional balance questionnaires. This study aims to characterize balance abilities of PD patients using computerized static and, for the first time, dynamic balance measurements. Eleven healthy adults (age: 31.8±4.3 y, 6 men) and 12 participants with PD (36.9±10.3y, 4 men) participated. Participants’ diagnosis was confirmed using the DSM-IV (SCID-1). The severity of panic symptoms was evaluated using the HAM-A PDSS and PAS. The participants’ balance was assessed clinically using the ABC and dizziness by the DHI scale. Functional balance was evaluated physically by the mini-BESTest. Static balance was evaluated by velocity and ellipse area of body sway. Dynamic balance was evaluated using the time to regain stability. Participants with PD had significantly higher scores on the HAM-D, PDSS and PAS questionnaires and significantly lower scores on the functional balance questionnaires. In the static balance tests PD patients showed similar ellipse area and body sway velocities, where in the dynamic balance test PD patients’ recovery time was faster than of the controls (1.56±0.91; 2.09±1.19, respectively; P=0.018). Our results point to potential subtle differentiated mechanisms adopted by this cohort to maintain balance. Further research is needed to delineate these mechanisms with respect to the fluctuating affective state of these persons.